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JAMB Mathematics 1991 Question 21

Question 21

Inequalities

Find the range of value of x which satisfy the inequality (x/2 + x/3 + x/4) < 1

  1. A.x < 12/13
  2. B.x < 13
  3. C.x < 9
  4. D.x < 13/12
Show the answer and explanation

Answer: A (x < 12/13)

Explanation

x/2 + x/3 + x/4 = 13x/12. So 13x/12 < 1 gives x < 12/13.